LOCTITE® 403 Instant Adhesive
Features and Benefits
LOCTITE 403 Instant Adhesive is a low odour, low bloom alkoxyethyl-based instant adhesive that is ideal for absorbent surfaces and in applications where vapour control is difficult.
LOCTITE® 403 Instant Adhesive is a medium viscosity product with low odour and low blooming properties that is transparent and colourless when cured. LOCTITE 403 provides for rapid bonding to metals, plastics, and elastomers, as well as to porous and absorbent materials such as wood, paper, leather, and fabrics.
- Low odour for applications where vapour control is vital
- Low bloom for cosmetic applications
- Transparent and colourless
- Well suited to porous substrates
Documents and Downloads
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Technical Information
| Application method, Recommended | Dispense system, Manual |
| Applications, Recommended | Bonding close fitting parts |
| Colour | Ultra clear |
| Fixture time, Steel | 30.0 sec. |
| Gap fill | 0.2 mm |
| Key characteristics, Recommended | Bloom: low bloom, Gap filling, Odor: low odor, Surface insensitive, Viscosity: medium viscosity |
| Operating temperature | -40.0 - 80.0 °C (-40.0 - 175.0 °F ) |
| Shear strength, Mild Steel (grit blasted) | 20.3 N/mm² (2950.0 psi ) |
| Viscosity | 1200.0 mPa·s (cP) |
How to
Step by Step Guide
1. Preparation - Cleaning
It is recommended to use the correct LOCTITE® cleaner for the surface to be bonded (such as LOCTITE® SF 7063) to degrease and clean surfaces prior to applying the adhesive.
2. Preparation - Priming
To improve adhesion on difficult to bond plastic surfaces, apply LOCTITE® SF 770 to the bond area by brushing or dipping. Avoid applying excess primer. Allow the primer to dry.
3. Preparation - Activation
If cure speed is too slow, use appropriate activator LOCTITE® SF 7455 or LOCTITE® SF 7458. Apply activator to one bond surface by spray, brush or dipping (not primed surfaces). Allow the activator to dry.
4. Application
Apply adhesive to one side or part. Recommended dispensing equipment: for precise dispensing of small amounts of adhesive, use dispensing needles.
5. Assembly
Assemble parts immediately. The parts should be accurately located as the short fixture time leaves little opportunity for adjustment. Bond should be held or clamped until the adhesive has fixtured. Hint: if necessary, excess product can be cured by activator LOCTITE® SF 7455. Spray or drop activator onto excess product.
Frequently Asked Questions
What does it mean when an instant adhesive (CA) is "low odour/low bloom"?
Why is there a white haze on my parts around the bond area?
Why does my plastic crack when I use an instant adhesive (CA)?
Do instant adheisves (CA) need to be refrigerated?
Which products are food / drinking water approved?
What health and safety (H&S) precautions do I need to take when using this adhesive?
LOCTITE® 403
LOCTITE 403 Instant Adhesive is a low odour, low bloom alkoxyethyl-based instant adhesive that is ideal for absorbent surfaces and in applications where vapour control is difficult.